@nestjs/common
Version:
Nest - modern, fast, powerful node.js web framework (@common)
29 lines (28 loc) • 928 B
JavaScript
/**
* Decorator that assigns metadata to the class/function using the
* specified `key`.
*
* Requires two parameters:
* - `key` - a value defining the key under which the metadata is stored
* - `value` - metadata to be associated with `key`
*
* This metadata can be reflected using the `Reflector` class.
*
* Example: `@SetMetadata('roles', ['admin'])`
*
* @see [Reflection](https://docs.nestjs.com/fundamentals/execution-context#reflection-and-metadata)
*
* @publicApi
*/
export const SetMetadata = (metadataKey, metadataValue) => {
const decoratorFactory = (target, key, descriptor) => {
if (descriptor) {
Reflect.defineMetadata(metadataKey, metadataValue, descriptor.value);
return descriptor;
}
Reflect.defineMetadata(metadataKey, metadataValue, target);
return target;
};
decoratorFactory.KEY = metadataKey;
return decoratorFactory;
};